Ken McLaren will join the Qatar Investment Authority, an investor in Barclays and J Sainsbury, this year, Sky News understands.
Hedaifi has over 18 years of experience in banking business in general and the areas of retail banking, wealth management, strategic planning and product management in particular.
Apa spent little over a year at the Swiss bank, which is currently recovering from the loss Andrea Orcel, the head of its investment bank in September.
The company also announced its first private equity investment in China, where it partnered with Everbright, to invest up to $150 million in their New Economy Fund.
The QIA has about $320 billion in assets, ranking as the 10th largest wealth fund globally, according to the Sovereign Wealth Fund Institute.